Hydrological dichotomy: Streamflow drought in dammed vs. undammed regions of the largest Indian Peninsular basin

IF 2.6 3区 环境科学与生态学 Q2 ECOLOGY Journal of Arid Environments Pub Date : 2024-10-28 DOI:10.1016/j.jaridenv.2024.105273
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Abstract

Recurring streamflow drought is a significant problem, and it is necessary to comprehend the spatiotemporal patterns and driving factors of historical droughts in order to manage future water supplies effectively. Drought has significant and often severe effects on semi-arid and arid zones due to the already limited availability of water in these regions. Therefore, this research examines streamflow drought fluctuations in India's second-largest basin, the Godavari. The Godavari Basin experiences diverse climatic conditions ranging from humid in the Western Ghats to semi-arid in central and western regions. Frequent hydrological droughts have plagued the Godavari basin. Still, the impact of human activities and climate change on the streamflow drought characteristics in the Godavari basin has not been thoroughly investigated. Further, assessing the regional control of streamflow drought deficit and intensity in a large river basin like Godavari is crucial. The findings show that streamflow drought is worst in central and eastern Godavari. Additionally, dammed and undammed locations have different streamflow drought characteristics. Droughts have lengthened in dam-affected areas. However, regions without dams have seen more deficit and intensity. Thus, different sustainable water management techniques are needed for the dammed and undammed regions of the Godavari basin.
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水文二分法:印度半岛最大盆地有坝地区与无坝地区的溪流干旱
反复出现的河流干旱是一个重大问题,有必要了解历史干旱的时空模式和驱动因素,以便有效管理未来的供水。干旱对半干旱和干旱地区的影响很大,而且往往很严重,因为这些地区的水资源本来就很有限。因此,本研究对印度第二大盆地戈达瓦里流域的河水干旱波动进行了研究。戈达瓦里流域的气候条件多种多样,从西高止山脉的潮湿地区到中部和西部地区的半干旱地区。频繁的水文干旱一直困扰着戈达瓦里盆地。然而,人类活动和气候变化对戈达瓦里流域水流干旱特征的影响尚未得到深入研究。此外,在戈达瓦里这样的大河流域,评估区域对流体干旱赤字和强度的控制至关重要。研究结果表明,戈达瓦里河中部和东部的水流干旱最为严重。此外,有坝和无坝地区也有不同的水流干旱特征。受水坝影响地区的干旱时间延长。然而,无水坝地区的赤字更多,强度更大。因此,戈达瓦里流域有坝地区和无坝地区需要采用不同的可持续水资源管理技术。
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来源期刊
Journal of Arid Environments
Journal of Arid Environments 环境科学-环境科学
CiteScore
5.70
自引率
3.70%
发文量
144
审稿时长
55 days
期刊介绍: The Journal of Arid Environments is an international journal publishing original scientific and technical research articles on physical, biological and cultural aspects of arid, semi-arid, and desert environments. As a forum of multi-disciplinary and interdisciplinary dialogue it addresses research on all aspects of arid environments and their past, present and future use.
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